Let's set aside big and distant matters like environmental changes, species extinction, and evolution for survival. It's clear that the coral sea is no longer an environment suitable for normal biological life.
As Li Fan approached in human form, not only did the system keep 'dropping a bit' and 'dropping a lot' in alerts, but he also distinctly felt that his breathing was stifled. It was hot and humid, stale and fishy, and extremely uncomfortable. Even trying to change into the Gonggong physique didn't work; after all, the serpentine Gonggong is suited for an aquatic environment and merely impervious to Xuanming's true Qi. But now that even the merfolk, who are also aquatic creatures, have mutated, that was naturally useless. There was no point in even considering the abilities of other mountain deities and the Qiongqi physique.
But Li Kun could! After all, as the so-called Divine Beast, it had its uses...
